if you do a favor for somebody, you will get a return favor/if a fish is friendly toward water, water will be kind to the fish too/mutual back-scratching
expressions (phrases, clauses, etc.)
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魚の目;うおのめ
corn (on one's foot)
noun
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魚灯;ぎょとう
lights to lure fish
noun
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魚油;ぎょゆ
fish oil
noun
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魚板;ぎょばん
large flat wooden plank shaped like a fish, struck like a gong at temple to indicate time of day